linear integrated systems ? 4042 clipper court ? fremont, ca 94538 ? tel: 510 490 - 9160 ? fax: 510 353 - 0261 doc 201130 05/07 / 2014 rev#a11 ecn# LS3954a LS3954 ls3955 ls3956 ls3958 features low drift i v g s1 - 2 /t = 5 v/ c max. low leakage i g = 2 0pa typ. low noise e n =10nv/hz typ. absolute maximum ratings 1 @ 25 c (unless otherwise noted ) maximum temperatures storage temperature - 55 to +150c operating junction temperature - 55 to +150 c maximum voltage and current for each transistor 1 - v gss gate voltage to drain or source 6 0v - i g(f) gate forward current 5 0mv maximum power dissipation device dissipation @ free air - total 4 00mw @ 25oc 2 electrical charac teristics @ 25oc (unless otherwise noted) symbol characteristic LS3954a ls 3954 ls 3955 ls 3956 ls 3958 units conditions ? v gs1 - 2 / ? t max. drift vs. temperature 5 10 25 50 100 v/oc v dg = 20v, i d =200a t a = - 55oc to +125oc v gs1 - 2 max. offset voltage 5 5 10 15 25 mv v dg =20v, i d =20 0a symbol characteristic min. typ. max. units conditions bv gss breakdown v oltage 60 -- -- v v ds = 0 i g = 1a bv ggo gate - to - gate breakdown 60 -- -- v i gg = 1a i d = 0 i s = 0 transconductance g fss full conduction 1000 2000 4 000 s v dg = 20v v gs = 0 f = 1khz g fs typical operation 500 700 125 0 s v dg = 20v i d = 200a g fs1 - 2 / g fs differential -- 0.6 3 % drain current i dss full conduction 0.5 2 5 ma v ds = 20v v gs = 0 i dss1 - 2 /i dss differential -- 1 5 % gate voltage v gs (off) pinchoff voltage - 1 - 2 - 4.5 v v ds = 20v i d = 1na v gs operating range - 0.5 -- - 4 v v ds = 20v i d = 200a gate current - i g operating -- 20 50 pa v dg = 20v i d = 200a - i g high temperature -- -- 50 na v d g = 20v i d = 200a t a =+125 oc - i g reduced v dg -- 5 -- pa v d g = 10v i d = 200a - i g ss at full conduction -- -- 100 pa v d g = 20v v ds = 0 LS3954a LS3954 ls3955 ls3956 ls3958 low noise low drift monolithic dual n - channel jfet amplifier top view soic top view to - 71 & to - 78
linear integrated systems ? 4042 clipper court ? fremont, ca 94538 ? tel: 510 490 - 9160 ? fax: 510 353 - 0261 doc 201130 05/07 / 2014 rev#a11 ecn# LS3954a LS3954 ls3955 ls3956 ls3958 symbol characteristic min. typ. max. units conditions output conductance g oss full conduction -- -- 3 5 s v dg = 20v v gs = 0 g os operating -- 0.5 1 s v dg = 20v i d = 200a g os1 - 2 differential -- 0. 0 5 s common mode rejection cmrr - 20 log v gs1 - 2 /v ds -- 100 -- db v ds = 10 to 20v i d =200a cmrr - 20 log v gs1 - 2 /v ds -- 75 -- db v ds = 5 to 10v i d =200a noise nf figure -- -- 0.5 db v ds = 20v v gs = 0 r g =10m? f= 100hz nbw=6hz e n voltage -- -- 15 nv/hz v ds = 20v i d = 200a f= 10hz nbw=1hz capacitance c iss input -- -- 6 pf v ds = 20v v gs = 0 f= 1m hz c rss reverse transfer -- -- 2 pf c dd drain - to - drain -- 0.1 -- pf v dg = 20v i d = 200a linear integrated systems (lis) is a 25 - year - old, third - generation precision semiconductor company providing high - quality discrete components. expertise brought to lis is based on processes and products develo ped at amelco, union carbide, intersil and micro power systems by company president john h. hall. hall, a protg of silicon valley legend dr. jean hoerni, was the director of ic development at union carbide, co - founder and vice president of r&d at intersi l, and founder/president of micro power systems. to - 71 to - 78 soic s1 d1 ss g1 g2 ss d2 s2 s1 d1 ss g1 g2 ss d2 s2 note: all dimensions in inches 1. these ratings are limiting value s above which the serviceability of any semiconductor may be impaired. 2. derate 4mwoc above 25o c information furnished by linear integrated systems is believed to be accurate and reliable. however, no responsibility is ass umed for its use; nor for any infrin gement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of linear integrated systems. notes: p - dip 0.210 0.170
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